Arrangement in a Perforated Roll of a Fiber Web Machine and Prefabricated Sensor Sheet for a Perforated Roll of a Fiber Web Machine

Patent metadata

Field	Value
Publication number	US-2016355362-A1
Application number	US-201615171767-A
Country	US
Kind code	A1
Filing date	Jun 2, 2016
Priority date	Jun 3, 2015
Publication date	Dec 8, 2016
Grant date	—

Abstract

A perforated roll ( 10 ) of a fiber web machine includes a roll shell ( 19 ), holes ( 13 ) extending through the roll shell, and a sensing system ( 14 ) arranged in the roll shell. The sensing system ( 14 ) includes at least one pair of leads ( 16 ), to which one or more sensors ( 15 ) have been connected. At least one pair of leads is composed of flat leads ( 17.2, 17.2 ), which are arranged in the roll shell side by side. A prefabricated sensor sheet ( 26 ) may be prepared for a perforated roll of a fiber web machine, such that holes may be drilled therethrough to communicate with the roll shell holes ( 13 ).

First claim

We claim:

1 . An arrangement in a perforated roll of a fiber web machine, the arrangement comprising:
a roll shell; a plurality of first holes extending through the roll shell; a sensing system arranged in the roll shell, which sensing system includes at least one pair of leads, to which one or more sensors are connected, wherein the at least one pair of leads comprise a pair of elongated flat leads which have been arranged on the roll shell side by side, each flat lead has a width extending along the surface of the roll shell which is greater than its thickness extending radially outward from the roll shell.

2 . The arrangement of claim 1 , wherein at least one of the flat leads has cuts at the location of the first holes.

3 . The arrangement of claim 1 wherein the first holes have a first diameter, and wherein the width of the flat leads is greater than the diameters of the first holes.

4 . The arrangement of claim 1 wherein the sensor extends between the flat leads.

5 . The arrangement of claim 1 wherein the sensor extends between holes.

6 . The arrangement of claim 1 wherein the sensing system includes three flat leads which form two pairs of leads, and wherein at least two sensors are connected to at least one flat lead of the flat leads, which sensors are on the opposite side of the flat lead.

7 . The arrangement of claim 1 wherein a cut at the location of a first hole includes an insulation between the flat lead and the first hole.

8 . The arrangement of claim 1 wherein the roll shell further comprises:
an inner hollow cylindrical part;
a coating; and
a sensing system arranged over the coating and positioned in connection with the coating.

9 . The arrangement of claim 1 wherein the roll shell further comprises an inner cylindrical part with an outer surface, and further comprising:
a pre-coating layer arranged on the surface of the inner cylindrical part; and
an outer coating layer extending over the pre-coating layer, and wherein the sensing system is between the pre-coating layer and the outer coating layer.

10 . The arrangement of claim 9 , wherein the pre-coating includes a recess at the location of a hole for the arrangement of an insulation between the flat lead and a hole.

11 . A prefabricated sensor sheet for mounting to a perforated roll of a fiber web machine, the prefabricated sensor sheet comprising:
a background adapted to support the sensing system for its installation to the perforated roll; at least two parallel flat leads arranged on the background and adapted to form at least one pair of leads; at least one sensor connected to the pair of leads; and a sensing system of a specific dimension is adapted to be cut from the prefabricated sensor sheet, which sensing system can be fastened to an installation surface formed on the roll shell of the perforated roll.

12 . The prefabricated sensor sheet of claim 11 wherein the background comprises a film-like elongated strip having an adhesive surface on one side thereof, the flat leads and the at least one sensor being supported on an opposite side of the background with respect to the adhesive surface.

13 . The perforated sensor sheet of claim 11 wherein the one or more sensors is selected from the group consisting of an EMFi electric sensor, a PVDF electric sensor, a piezoelectric sensor, a capacitive sensor, a resistive sensor, an inductive sensor, and an eddy current sensor.

14 . The perforated sensor sheet of claim 11 wherein the one or more sensors are of about the same thickness as the at least two flat leads.

15 . A perforated roll for a fiber web machine, comprising:
a cylindrical roll shell having an outer surface, wherein portions of the roll shell define a plurality of first holes of a first diameter which extend through the outer surface and the roll shell; a first flat lead extending over the outer surface of the roll shell such that at least one of the plurality of first holes extends through the first flat lead; a second flat lead alongside and spaced from the first flat lead and extending over the outer surface of the roll shell such that at least one of the plurality of first holes extends through the second flat lead; and one or more sensors which are connected to the roll shell and connected between the first flat lead and the second flat lead.

16 . The perforated roll of claim 15 further comprising:
a pre-coating layer arranged on the outer surface of the roll shell, wherein the first flat lead, the second flat lead, and the sensor are fastened to the pre-coating layer;
an insulation element disposed on the pre-coating layer and extending radially outwardly through a second hole in the first lead which communicates with one of the first holes; and
an outer coating layer which overlies the pre-coating layer, the first flat lead, the second flat lead, the insulation element, and the one or more sensors.

17 . The perforated roll of claim 15 wherein the one or more sensors is selected from the group consisting of an EMFi electric sensor, a PVDF electric sensor, a piezoelectric sensor, a capacitive sensor, a resistive sensor, an inductive sensor, and an eddy current sensor.

Assignees

• Röyskö Kari
• Kettunen Heikki
• Pitkänen Tatu
• Valmet Technologies Inc

Inventors

• Röyskö Kari
• Kettunen Heikki
• Pitkänen Tatu

Classifications

• D21F3/10

  Suction rolls, e.g. couch rolls · CPC title

• G01L1/00 Primary

  Measuring force or stress, in general (measuring force due to impact G01L5/00) · CPC title

• D21F1/36

  Guiding mechanisms · CPC title

• B65H27/00 Primary

  Special constructions, e.g. surface features, of feed or guide rollers for webs (rollers in general F16C13/00) · CPC title

• D21F5/042

  in combination with suction or blowing devices · CPC title